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Metal-vapor lasers

Laser gain medium and type Operation wavelength(s) Pump source Applications and notes
Helium–cadmium (HeCd) metal-vapor laser 325 nm, 441.563 nm Electrical discharge in metal vapor mixed with helium buffer gas. Printing and typesetting applications, fluorescence excitation examination (i.e. in U.S. paper currency printing), scientific research.
Helium–mercury (HeHg) metal-vapor laser 567 nm, 615 nm Electrical discharge in metal vapor mixed with helium buffer gas. (Rare) Scientific research, amateur laser construction.
Helium–selenium (HeSe) metal-vapor laser up to 24 wavelengths between red and UV Electrical discharge in metal vapor mixed with helium buffer gas. (Rare) Scientific research, amateur laser construction.
Helium–silver (HeAg) metal-vapor laser[3] 224.3 nm Electrical discharge in metal vapor mixed with helium buffer gas. Scientific research
Strontium vapor laser 430.5 nm Electrical discharge in metal vapor mixed with helium buffer gas. Scientific research
Neon–copper (NeCu) metal-vapor laser[3] 248.6 nm Electrical discharge in metal vapor mixed with neon buffer gas. Scientific research: Raman and fluorescence spectroscopy[4][5]
Copper vapor laser 510.6 nm, 578.2 nm Electrical discharge Dermatological uses, high speed photography, pump for dye lasers.
Gold vapor laser 627 nm Electrical discharge (Rare) Dermatological uses, photodynamic therapy.[6]
Manganese (Mn/MnCl2) vapor laser 534.1 nm Pulsed electric discharge

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